<objective Diagnose and auto-repair broken skills. Run for a full library scan or for a single skill diagnosis. Reports issues by severity with health scoring and offers auto-fixes with user confirmation. </objective <quick start </quick start <success criteria - All YAML frontmatter validates against Anthropic spec - All required XML sections present ( , , ) - All config.json files use standard schema with correct keys - Health score reported: X/Y checks passing per skill - Auto-fixes applied ONLY with user confirmation (preview diff first) - Self-test passes: reports 0 issues </success crit…